Disable-ADAccount

#DON'T FORGET TO EDIT THE FUNCTION NAME INTO SOMETHING MEANINGFUL TO YOU
Function My-DisableAccount{
<#
.SYNOPSIS
Disables Active Directory Account of User
.DESCRIPTION
Disables AD Account, hides email address from Global Address list, if an email is present, and gives manager access to user mailbox if a Manager is assigned in AD
.PARAMETER UserName
The name of the user to disable
.EXAMPLE
.\My-DisableAccount [Username]
#>
    [CmdletBinding()]
    Param(
    [Parameter(Mandatory=$true)]
    [String]$Username
    )


#Disables AD UserAccount
Set-ADUser $Username -Enabled $false

#Changes Userpassword
Set-ADAccountPassword -Identity $Username -NewPassword (ConvertTo-SecureString -AsPlainText "Password" -Force)

Write-Host "The Account, $Username, has been disabled and the password has been changed"

#Imports session to Exchange server to enable remote management
$Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri http://[FQDN of Exchange Server]/PowerShell/ -Authentication Kerberos -WarningAction:SilentlyContinue
Import-PSSession $Session

#Checks for Mailbox assigned to user
$EmailAddress = Get-Mailbox -Identity $Username

    If ($EmailAddress -eq $null)
    {
        Write-Host "The error occurred because $username does not have a mailbox"

        Get-PSSession | Remove-PSSession -WarningAction:SilentlyContinue
    }
    else
    {
            #Checks for assigned manager to user
            $Manager = (Get-Aduser (Get-Aduser -identity $Username -Properties Manager | Select-Object Manager).Manager).samAccountName

            IF ($Manager -eq $Null)
            {
                Write-host "The above error occured because $username does not have a manager assigned"

                #Hides user from GAL
                Set-Mailbox -Identity $Username -HiddenFromAddressListsEnabled $true

                Write-Host "The mailbox for, $Username, has been hidden from Exchange Lists"

                #Removes remote session to exchange server
                Get-PSSession | Remove-PSSession -WarningAction:SilentlyContinue

            }

            else

            {
                #Hides user from GAL
                Set-Mailbox -Identity $Username -HiddenFromAddressListsEnabled $true

                #Grants manager access to user mailbox
                Add-MailboxPermission -Identity $Username -User $Manager -AccessRights Fullaccess -InheritanceType all

                Write-Host "The maillbox for $Username has been hidden from Exchange Lists and $Manager has full access to the Mailbox"

                #Removes remote session to exchange server
                Get-PSSession | Remove-PSSession -WarningAction:SilentlyContinue

            }
    }



}